Method of preparing cerium-activated yttriumaluminate phosphor of improved efficiency

摘要

A cerium-activated yttriumaluminate phosphor such as YA103:Ce featuring an enhanced luminous intensity is produced by adding a barium compound exemplified by BaO, BaCO3, Ba(OH)2 and BaF3 to a mixture of source materials of the host material and the activator and baking the resulting mixture at a usual temperature ranging from 1000 DEG to 1400 DEG C. The barium compound preferably amounts to 0.001-8 mol% of the yttriumaluminate and may alternatively be introduced into a preliminarily baked and pulverized mixture of the source materials.